NSF International announced that it has added perchlorate to the list of chemicals that drinking water treatment units can be tested against. Perchlorate is both naturally occurring and a manmade chemical found in rocket fuel that may pose serious health risks to consumers. The new requirements, under NSF/ANSI Standard 58: Reverse Osmosis Drinking Water Treatment Systems, test and certify drinking water treatment units to ensure that products are available to reduce consumer exposure to perchlorate. For an updated list of water treatment devices that comply with the new protocol, visit www.nsf.org/certified/dwtu.